Deck 4: Nokia Services Architecture

Question 1

Which of the following statements is FALSE regarding the UE paging process?

A) The SGW performs downlink data buffering while the S1 bearer is being established.
B) The SGW initiates the paging messages towards the UE.
C) The PGW is not aware of the paging process.
D) The UE initiates the service request procedure once it receives the paging message.
E) The paging procedure is controlled by the MME.

Answer 1

The SGW initiates the paging messages towards the UE.

Question 2

Which of the following statements is TRUE regarding the IP connectivity between a UE and a PDN?

A) A UE gets an IPv4 address and/or an IPv6 prefix per APN.
B) A PGW forwards the UE's IP packets to the PDN based on the address of the PDN server.
C) When a UE sends an IP packet to a PDN over the EPC core, the eNodeB forwards the encapsulated packet to the SGW by looking into its IP routing table to determine how to reach the PDN server.
D) The SGW forwards the UE's IP packets to the PGW based on the address of the PDN server.
E) Only answers C and D are correct.
F) Only answers A and B are correct.

Answer 2

Only answers A and B are correct.

Question 3

Which of the following statements most accurately describes the Diameter protocol?

A) The Diameter is a peer-to-peer protocol that uses the TCP or SCTP as the transport protocol.
B) A Diameter peer could act as a Diameter client or a Diameter server to its remote peer.
C) The Alcatel-Lucent 7750 PGW acts as a Diameter client to the PCRF server via the Gx interface.
D) The Diameter protocol uses TCP and SCTP port number 3868.
E) All of the above answers are correct.
F) Only answers A and B are correct.

Answer 3

All of the above answers are correct.

Question 4

Which of the following statements is FALSE regarding the S1-MME interface?

A) It is the control plane interface between the E-UTRAN and the MME.
B) It is used to signal the TEIDs for the S1 bearers between the eNodeB and the SGW.
C) The eNodeB receives the Paging messages over the S1-MME interface.
D) It is used for the management of the Radio Access Bearers.
E) It is based on the IP/UDP protocols.

Question 5

Which of the following statements is FALSE regarding the UE network attachment procedure?

A) The UE is served by an eNodeB.
B) The eNodeB selects one MME to serve the UE.
C) The MME selects one SGW to serve the UE.
D) The SGW selects one PGW to serve the UE
E) The PGW selects one PCRF server if required.

Question 6

The S5 is the interface used for the communication between the SGW and the PGW. Which of the following transport protocols is used by this interface?

A) GTP/TCP
B) GTP/UDP
C) GTP/IP
D) GTP/SCTP
E) None of the above answers are correct

Question 7

Which of the following interfaces is not using the GTP-C protocol?

A) The X2 interface.
B) The S1-U interface.
C) The S4 interface.
D) The S5 interface.
E) The SGi interface.

Question 8

There is an active GTP path between an Alcatel-Lucent SGW and an Alcatel-Lucent PGW, On the SGW. Which of the following CLI commands is used to check the "Restart Count" value of the PGW?

A) show mobile-gateway serving ref-point-peers s5
B) show mobile-gateway serving ref-point-stats s5
C) show mobile-gateway serving bearer-stats s5
D) show mobile-gateway serving path-mgmt-stats s5
E) None of the above answers are correct.

Question 9

Which of the following statements is FALSE regarding the EPS bearers?

A) The default bearer is initiated by either the UE or the PCRF.
B) The default bearer is always the first bearer established to an APN.
C) An AF server may initiate a dedicated bearer to a UE.
D) EPS bearers that connect a given UE to a single PGW may use different IP subnets.
E) The default bearer remains active throughout the lifetime of the APN connection.

Question 10

Which of the following statements is FALSE regarding the eNodeB?

A) The eNodeBs maybe interconnect TEID with each other via anX2 interface.
B) The eNodeB is an element of the EPC core.
C) The eNodeBs are connected to the EPC core via the S1 interface.
D) During an IMSI attach, the eNodeB selects an MME to service the UE.
E) The eNodeB performs the compression and encryption of the user data stream.

Question 11

A UE needs to get an IP address before it can communicate to any PDN over the LTE network. Which of the following statements are FALSE regarding the process of the IP address allocation? (Choose two)

A) A PGW may obtain an IP address from a RADIUS server and assign it to the UE.
B) A PGW may assign the IP address from its local address pools.
C) An SGW may obtain a static IP address from the HSS server and assign it to the UE.
D) An SGW may obtain an IP address from a RADIUS server and assign it to the UE.
E) A PGW may obtain an IP address from a DHCP server and assign it to the UE.

Question 12

Based on the information shown in the exhibit, which of the following is the PLMN ID?

A) 302
B) 720
C) 123456789
D) 9876543
E) 30201613
F) 302720

Question 13

Based on the information shown in the exhibit, when the SGW receives an IP packet from the UE, which of the following is the GTP TEID value expected to be received in the GTP packet header?

A) 0xd05025
B) 0x4b00805
C) 0x21
D) 0x4b00825
E) None of the above answers are correct.

Question 14

Which of the following statements is FALSE regarding the Tracking Area (TA)?

A) A TA is a set of eNodeBs that are defined by a UE itself.
B) A TA is the smallest geographical area in which a UE can roam without performing a Tracking Area Update (TAU) other than periodic TAU as required.
C) A Tracking Area Identity (TAI) is used to identify each tracking area.
D) The Tracking Area Identity (TAI) is assigned by the service provider.
E) One TA may be served by one or more than one MME.

Question 15

Which of the following most accurately describes the messages used to manage a Diameter connection path?

A) The Capabilities-Exchange message
B) The Device-Watchdog message
C) The Credit-Control message
D) The Disconnect-Peer message
E) All of the above answers are correct
F) Only answers A, B and D are correct

Question 16

Which of the following statements most accurately describes the MME?

A) The MME selects the SGW and the PGW for a given UE.
B) The MME is responsible for the bearer management.
C) The MME communicates with both the E-UTRAN and the EPC via GTP-C tunnels.
D) The MME performs the user authentication and authorization using the information provided by the HSS
E) All of the above answers are correct.
F) Only answers A, B and D are correct.

Question 17

An Alcatel-Lucent SGW is only connected to an Alcatel-Lucent PGW. Based on the information shown in the exhibit, how many GTP-C tunnels are established between the SGW and the PGW?

A) 1
B) 2
C) 3
D) 4
E) 6

Question 18

Which of the following most accurately identifies a GTP tunnel on the Alcatel-Lucent 7750 MG by default?

A) A TEID
B) The System IP address
C) A UDP port number
D) A TEID and the System IP address
E) A TEID, the System IP address and a UDP port number

Question 19

Which of the following LTE interfaces are used for the communication of user data? (Choose one best answer)

A) The S1-MME interface and the S11 interface.
B) The S1-U interface.
C) The S5 interface.
D) The S1-U interface, the S5 interface and the LTE-Uu interface.
E) Only answers A, B and C are correct.
F) Only answers B and C are correct.

Question 20

In a 3G network, which of the following is used to build a PDP context between a UE and the GGSN when a direct tunnel is not used?

A) An end-to-end GTP tunnel between the UE and the GGSN.
B) A Radio Access Bearer between the UE and the NodeB and a GTP tunnel between the NodeB and the GGSN.
C) A Radio Access Bearer between the UE and the SGSN and a GTP tunnel between the SGSN and the GGSN.
D) A Radio Access Bearer between the UE and the SGSN.
E) None of the above answers are correct.

Question 21

On an Alcatel-Lucent 7750 PGW, which of the following is the CLI context where you can specify the IP address and port number of a PCRF server?

A) Under the Diameter profile context.
B) Under the Diameter Peer profile context.
C) Under the Gx interface context.
D) Under the APN context.
E) None of the above answers are correct.

Question 22

During the establishment of a default bearer, which of the following statements are TRUE regarding the TEID-U assigned by the eNodeB to the S1-U tunnel? (Choose two)

A) The eNodeB includes this TEID-U value in the Create Session Request message sent to the SGW over the S1 interface.
B) The eNodeB includes this TEID-U value in the Attach Request message sent to the MME over the S1-MME interface.
C) The MME includes this TEID-U value in the Create Session Request message sent to the SGW over the S11 interface.
D) The MME includes this TEID-U value in the Modify Bearer Request message sent to the SGW over the S11 interface.
E) The eNodeB includes this TEID-U value in the Attach Complete message sent to the MME over the S1-MME interface.
F) The eNodeB includes this TEID-U value in the Modify Bearer Request message sent to the SGW over the S1 interface.

Question 23

Which of the following messages are exchanged between the MME and the SGW during the UE attachment procedure? (Choose two)

A) Create Session Request / Create Session Response
B) Credit Control Request / Credit Control Answer
C) Attach Request/Attach Accept
D) Update Bearer Request / Update Bearer Response
E) Modify Bearer Request / Modify Bearer Response

Question 24

Based on the information shown in the exhibit, which of the following is TRUE when the PGW receives a "Create Session Request" with the "APN Restriction" set to "Private2"? Assume everything else is in working condition.

A) The "Create Session Request" is rejected by the PGW and no bearer is created.
B) The "Create Session Request" is accepted by the PGW and the bearer is created successfully.
C) The APN cannot be configured with an "APN Restriction" value of "any".
D) The "Create Session Request" cannot have an "APN Restriction" value of "Private2.
E) None of the above answers are correct.

Question 25

How many S11 GTP-C tunnels are established for a UE having: - One default bearer to APN1, and - One dedicated bearer to APN1, and - One default bearer to APN2, and - Two dedicated bearers to APN2?

A) One
B) Two
C) Three
D) Four
E) Five

Question 26

Based on the information shown in the exhibit, which procedure has been executed on the SGW?

A) UE Triggered Service Request procedure
B) Network Triggered Service Request procedure
C) UE Initiated Dedicated Bearer Activation procedure
D) Network Initiated Dedicated Bearer Activation procedure

Question 27

Based on the information shown in the exhibit, when the SGW sends a downlink user data packet to the UE, which of the following is the source IP address expected in the IP packet?

A) 10.10.2.1
B) 10.10.7.1
C) 20.20.0.1
D) 72.22.24.163
E) None of the above answers are correct

Question 28

On Alcatel-Lucent 7750 PGW, which of the following CLI commands can be used to check the IP addresses assigned to a particular UE?

A) Show mobile-gateway pdn pdn-context
B) Show mobile-gateway serving pdn-context imsi detail
C) Show mobile-gateway pdn ue-context
D) Show mobile-gateway pdn ue-context imsi detail
E) Show mobile-gateway pdn bearer-context
F) Show mobile-gateway pdn bearer-context imsi detail

Question 29

Which of the following statements is FALSE regarding the MG-ISM module on an Alcatel-Lucent 7750 MG?

A) The MG-ISM module implements the PCC rules for the EPS bearers.
B) The MG-ISM module can be configured as a SGW/SGSN or a PGW/GGSN.
C) The MG-ISM module enforces the QoS rules for the EPS bearers.
D) On an Alcatel-Lucent 7750 MG, two MG-ISM modules can be configured as 1+1 redundant.
E) The switchover from the active MG-ISM card to the standby MG-ISM card has no impact on other EPC nodes

Question 30

Which network entities assign TEIDs to the indirect data tunnel used during an S1-based handover with no SGW relocation?

A) The source eNodeB and the SGW.
B) The source eNodeB, the SGW, and the target eNodeB.
C) The SGW and the target eNodeB.
D) The source eNodeB and the target eNodeB.

Question 31

Based on the information shown in the exhibit, what is the action taken by the SGW when: - The SGW receives a GTP packet over its S5 interface, and - The TEID value in the GTP header is set to 0xd06c05?

A) The packet is forwarded to the eNodeB.
B) The packet is buffered.
C) The packet is dropped.
D) The packet is forwarded to the MME.

Question 32

On the Alcatel-Lucent 7750 PGW, which of the following is the default setting of the APN "selection-mode"?

A) ms-provided-apn
B) network-provided-apn
C) subscribed-apn
D) virtual-apn
E) None of the above answers are correct

Question 33

Based on the information shown in the exhibit, which of the following is TRUE when the PGW receives a "Create Session Request" with the "PDNTYPE" set to IPv4?

A) The PGW tries to allocate an IP address from the subnet "5.5.0.0/16" and assigns it to the UE.
B) The PGW tries to allocate an IP address from the subnet "3FFE::/48" and assigns it to the UE.
C) The "Create Session Request" is rejected by the PGW.
D) There is insufficient information to answer this question.

Question 34

Based on the information shown in the exhibit, which of the following is the time interval used by the SGW to send out an "Echo Request" message over the GTP interface?

A) 3 seconds
B) 5 seconds
C) 6 seconds
D) 60 seconds
E) 90 seconds

Question 35

Based on the information shown in the exhibit, and assuming this is the only bearer present, what is the action taken by the SGW when: - The SGW receives a GTP packet over its S5 interface, and - The TEID value in the GTP header is set to 0x802d25?

A) The packet is forwarded to the eNodeB
B) The packet is buffered.
C) The packet is dropped.
D) The packet is forwarded to the MME.

Question 36

Based on the information shown in the exhibit, what type of handover is performed when the UE moves from eNodeB2 to eNodeB4?

A) X2-based handover without SGW relocation
B) X2-based handover with SGW relocation
C) X2-based handover with MME relocation
D) S1-based handover with SGW relocation
E) S1-based handover with MME relocation

Question 37

During an S1-based handover with MME relocation, which network entity requests the creation of an indirect data forwarding tunnel by sending a "Create Indirect Data Forwarding Tunnel Request" message to the SGW?

A) The source MME.
B) The target MME.
C) The source eNodeB.
D) The target eNodeB.

Question 38

Based on the information shown in the exhibit, what is the TEID value 0x37 used for?

A) This TEID value is used by the source eNodeB when sending downlink data traffic to the target eNodeB.
B) This TEID value is used by the target eNodeB when sending uplink data traffic to the SGW.
C) This TEID value is used by the source eNodeB when sending downlink data traffic to the SGW.
D) This TEID value is used by the SGW when sending downlink data traffic to the source eNodeB.
E) This TEID value is used by the SGW when sending downlink data traffic to the target eNodeB.

Question 39

Which of the following statements is TRUE when the Alcatel-Lucent 7750 MG receives a GTP packet that has a zero TEID?

A) The ingress IOM forwards the packet directly to the MG-ISM module for further processing.
B) The ingress IOM drops the packet.
C) The ingress IOM forwards the packet to the CPM for further processing.
D) The Alcatel-Lucent 7750 MG forwards the packet to its IP destination by looking into the local IP routing table.
E) None of the above answers are correct.

Question 40

Which entity decides when a handover procedure needs to be performed?

A) The UE.
B) The source eNodeB.
C) The target eNodeB.
D) The MME.
E) The SGW.

Question 41

Which of the following statements are TRUE regarding the SDF templates /filters? (Choose three)

A) An SDF filter can identify an SDF flow by matching the information in the IP 5-tuple and the Layer-7 application
B) One SDF template can have only one SDF filter for each direction.
C) One dedicated bearer can have more than one SDF template and multiple SDF filters.
D) One dedicated bearer can have only one SDF template.
E) One SDF template can have multiple SDF filters for each direction,
F) One dedicated bearer can have more than one SDF template.

Question 42

Which of the following statements is FALSE regarding the support of MG-ISM redundancy on an Alcatel-Lucent 7750 MG?

A) MG-ISM redundancy is supported on Alcatel-Lucent 7750 SGW.
B) MG-ISM redundancy is supported on Alcatel-Lucent 7750 PGW.
C) MG-ISM 1+1 redundancy model is supported on Alcatel-Lucent 7750 MG.
D) MG-ISM one-to-many redundancy model is supported on Alcatel-Lucent 7750 MG.
E) None of the above statements are false.

Question 43

On Alcatel-Lucent 7750 SGW, which of the following statements is FALSE regarding the debugging of a given IMSI?

A) The debugging allows the operator to analyze information and messages related to a given IMSI in real-time.
B) The APN value must be specified in the debug command.
C) The output may be filtered per APN or per reference point.
D) The debugging supports three levels of tracing detail.
E) None of the above statements are false.

Question 44

Based on the information shown in the exhibit, which of the following statements is FALSE?

A) Gx commands are not being exchanged with the PCRF peer.
B) EPS bearers can be successfully established to this PGW.
C) The TCP connection to the PCRF peer is not established.
D) Watchdog messages are not being exchanged with the PCRF peer.
E) None of the above statements are false.

Question 45

On the Alcatel-Lucent 7750 PGW, which of the following CLI commands is used to check the contents of the SDF filters enforced on the PGW for a particular UE?

A) Show mobile-gateway pdn pdn-context
B) Show mobile-gateway pdn pdn-context imsi detail
C) Show mobile-gateway pdn bearer-context
D) Show mobile-gateway pdn bearer-context imsi detail
E) Show mobile-gateway pdn ue-context
F) Show mobile-gateway pdn ue-context imsi detail

Question 46

Which of the following statements is FALSE regarding the EPC QoS parameters?

A) The Guaranteed Bit Rate (GBR) is the traffic rate expected to be provided by a GBR bearer.
B) The MBR is the maximum bit rate expected to be provided by a GBR bearer.
C) The PGW enforces the APN-AMBR in the DL direction.
D) The APN-AMBR limits the traffic rate on a per bearer basis.
E) The APN-AMBR in the UL direction is enforced in the UE and additionally in the PGW.

Question 47

A UE is sending data to its FTP server over the EPC core with the TCP port 20. Based on the information shown in the exhibit, which of the following bearer(s) will be used for the uplink FTP flow?

A) The bearer # 5 will be used for the FTP flow.
B) The bearer #6 will be used for the FTP flow.
C) The bearer #7 will be used for the FTP flow.
D) Both bearer # 5 and bearer # 6 will be used for the FTP flow.
E) Both bearer #5 and bearer #7 will be used for the FTP flow.

Question 48

A dedicated bearer 6 has a total of six SDF filters. Based on the information shown in the exhibit, which of the following is the right order to apply the filters to the downlink traffic?

A) The filters: 0 (first), 1, 2, 3, 4, 5 (last).
B) The filters: 2 (first), 3, 0, 1, 4, 5 (last).
C) The filters: 0 (first), 2, 4 (last).
D) The filters: 3 (first), 5, 1 (last).
E) The filters: 0 (first), 4, 2 (last).
F) The filters: 2 (first), 4, 0 (last).

Question 49

Based on the information shown in the exhibit, which of the following is the MBR/GBR value for Bearer 6 in the DL direction?

A) 15000/10000 kbps
B) 30000/20000 kbps
C) 45000/30000 kbps
D) 60000/40000 kbps
E) None of the above answers are correct.

Question 50

Which of the following statements is FALSE regarding the configuration of Key Performance Indicator/Key Capacity Indicator (KPI/KCI) on an Alcatel-Lucent 7750 MG?

A) The mobile-gateway instance must be shutdown before enabling the stats collection
B) A log file must be configured.
C) An accounting policy must be configured.
D) Only one record can be configured in a policy.
E) Only one policy can be assigned to a serving/pdn instance.
F) None of the above statements are false.

Question 51

Assume that dynamic PCC rules are used on the PGW. When the UE sends a request to establish a dedicated bearer, which of the following messages are exchanged between the PCRF and the PCEF?

A) The RAR/RAA messages.
B) The CSR/CSResp messages.
C) The CCR/CCA messages.
D) The CSR/CSResp and the CCR/CCA messages.
E) The CSR/CSResp and the RAR/RAA messages

Question 52

On Alcatel-Lucent 7750 PGW, which of the following CLI commands is used to verify the EPS procedures being performed on the mobile gateway?

A) Show mobile-gateway pdn call-flow-statistics
B) Show mobile gateway pdn call-flows
C) Show mobile-gateway pdn call-flow-stats
D) Show mobile-gateway pdn 1 call-flow-statistics

Question 53

Which of the following does not apply during the CPM selection of an MG-ISM card?

A) The CPM load balances amongst all configured MG-ISM groups.
B) The CPM load balances based on the number of sessions currently handled by each MG-ISM group
C) All sessions established for a given UE are handled by the same MG-ISM group.
D) The selected MG-ISM card is responsible for bearer management and TEID assignment.
E) All of the above statements apply.

Question 54

A UE is sending best-effort (BE) IP traffic to a PDN server over the EPC core. Based on the information shown in the exhibit, what is the DSCP value of traffic egressing the SGi interface of the PGW to the PDN server?

A) BE
B) EF
C) AF21
D) NC
E) None of the above answers are correct.

Question 55

Which of the following parameters best describes the rate-limiting associated with a Non-GBR bearer?

A) The GBR and the MBR
B) The APN-AMBR
C) The MBR
D) The UE-AMBR
E) The APN-AMBR and the UE-AMBR

Question 56

Which of the following statements are TRUE regarding the Predefined PCC rules? (Choose two)

A) The Predefined PCC rules are preconfigured on the PCRF.
B) The Predefined PCC rules are preconfigured on the PCEF.
C) The Predefined PCC rules are preconfigured on the MME.
D) The Predefined PCC rules are activated or deactivated by the PCEF at any time.
E) The Predefined PCC rules are activated or deactivated by the PCRF at anytime.

Question 57

Which of the following statements is FALSE regarding the keep alive messages exchanged between the CPM card and an MG-ISM card?

A) The keep alive messages are exchanged between the CPM card and the active MG-ISM card.
B) The keep alive messages are exchanged between the CPM card and the standby MG-ISM card
C) The keep alive messages are exchanged between the active and standby MG-ISM cards.
D) The CPM card considers the MG-ISM card down if it misses 3 keep alive messages.

Question 58

Based on the information shown in the exhibit, which of the following statements is FALSE?

A) The collection interval is set to 30 minutes.
B) The number of active bearers at the end of this interval is 307
C) The stats are collected from MG-ISM card 5.
D) The number of idle users at the end of this interval is 10
E) None of the above statements are false.

Question 59

Which of the following statements is FALSE regarding the QCI / ARP?

A) An EPS bearer may be associated with more than one QCI value.
B) A new QCI policy can be defined on the Alcatel-Lucent 7750 MG to overwrite the default one.
C) A default QCI/ARP policy is predefined on the Alcatel-Lucent 7750 MG and cannot be modified.
D) A default bearer cannot be associated with a QCI value of 4.
E) The QCI has 9 classes and the ARP has 15 levels.

Question 60

During a UE detach procedure, which commands are exchanged over the gx interface?

A) Delete Session Request / Delete Session Answer
B) Credit Control Request Terminate/Credit Control Answer Terminate
C) Release Session Request / Release Session Answer
D) Credit Control Request Release / Credit Control Answer Release

Question 61

Which of the following statements is FALSE regarding the S1-based handover?

A) The SGW may be relocated.
B) The MME may be relocated.
C) Direct data forwarding via the X2 interface may be used.
D) Indirect data forwarding via the SGW may be used.
E) None of the above statements are false.

Question 62

Based on the information shown in the exhibit, how many mobile subscribers is the PGW currently serving?

A) 1
B) 2
C) 3
D) 5
E) 6
F) Unable to determine based on the provided information.

Question 63

Which of the following statements is TRUE when the Alcatel-Lucent 7750 MG receives a GTP packet that has a valid TEID?

A) The ingress IOM forwards the packet directly to the MG-ISM module for further processing.
B) The ingress IOM drops the packet.
C) The ingress IOM forwards the packet to the CPM for further processing.
D) The Alcatel-Lucent 7750 MG forwards the packet to its IP destination by looking into the local IP routing table.
E) None of the above answers are correct.

Question 64

Based on the information shown in the exhibit, when the SGW sends an uplink user IP packet to the PGW, which of the following is the GTP TEID value expected in the GTP packet header?

A) 0xd05425
B) 0x4f00805
C) 0x21
D) 0x4f00825
E) None of the above answers are correct

Question 65

Which of the following resources are freed when a registered UE goes idle? (Choose 2)

A) S1-MME signaling connection
B) S11GTP-C tunnel
C) S1 GTP-U tunnel
D) S5 GTP-C tunnel
E) S5 GTP-U tunnel

Question 66

Based on the information shown in the exhibit, which of the following is TRUE when the PGW receives a "Create Session Request" with the "APN Restriction" set to "Private1"? Assume everything else is in working condition.

A) The "Create Session Request" is rejected by the PGW and no bearer is created.
B) The "Create Session Request" is accepted by the PGW and the bearer is created successfully.
C) The APN cannot be configured with an "APN Restriction" value of "Private1".
D) The "Create Session Request" cannot have an "APN Restriction" value of "Private1".
E) None of the above answers are correct.

Question 67

Which of the following are Diameter-based interfaces?

A) The RF and the S10 interfaces.
B) The RF and the Gx interfaces.
C) The Rx and the S4 interfaces.
D) The Rx and the SGi interfaces.
E) The S9 and the S11 interfaces.

Question 68

The S1-MME is the interface used for the communication between the eNodeB and the MME. Which of the following transport protocols is used by this interface?

A) The Transmission Control Protocol (TCP)
B) The User Datagram Protocol (UDP)
C) The TCP or the UDP
D) The Stream Control Transmission Protocol (SCTP)
E) None of the above answers are correct

Question 69

Which of the following LTE interfaces are used for the communication of control messages? (Choose one best answer)

A) The S1-MME interface and the S11 interface.
B) The S5 interface.
C) The Gx interface.
D) The LTE-Uu interface and the Rx interface.
E) All of the above answers are correct.
F) Only answers A, B and C are correct.

Question 70

Which of the following statements is FALSE regarding the X2 interface?

A) It is the interface used to connect two eNodeBs.
B) It provides some mobility management functions between two eNodeBs.
C) The X2-AP is the application layer signaling protocol for the X2 interface.
D) It is never used to transport user data packets.
E) It is an IP-based interface.

Question 71

Based on the information shown in the exhibit, which of the following is the time interval used by the SGW to retransmit a GTP signaling message?

A) 3 seconds
B) 5 seconds
C) 6 seconds
D) 60 seconds
E) 90 seconds

Question 72

During a UE detach procedure, which commands are exchanged over the S5 interface?

A) Delete Session Request / Delete Session Response
B) Terminate Session Request/Terminate Session Response
C) Release Session Request / Release Session Response
D) Delete Bearer Request/Delete Bearer Response

Question 73

Which of the following is used to carry the GTP Path Management message "Echo Request"?

A) TheGTPv1 protocol.
B) The GTPv2 protocol.
C) The TCP protocol.
D) TheGTPv1 protocol or the GTPv2 protocol.
E) None of the above answers are correct.

Question 74

In a 3G network, which of the following statements most accurately describes the user data plane between a UE and the GGSN when a direct tunnel is not used?

A) A Radio Access Bearer between the UE and the NodeB, a GTP tunnel between the NodeB and the SGSN, and another GTP tunnel between the SGSN and the GGSN.
B) A Radio Access Bearer between the UE and the SGSN and a GTP tunnel between the SGSN and the GGSN.
C) A GTP tunnel between the UE and the GGSN.
D) A Radio Access Bearer between the UE and the RNC, a GTP tunnel between the RNC and the SGSN, and another GTP tunnel between the SGSN and the GGSN.
E) None of the above answers are correct.

Question 75

Which of the following messages are exchanged between the PGW and the PCRF during the UE attachment procedure?

A) Authorization Control Request/ Authorization Control Answer
B) Credit Control Request / Credit Control Answer
C) Create Session Request/ Create Session Answer
D) Attach Request/Attach Answer

Question 76

After a UE attachment procedure, which GTP-U tunnels are established for the UE?

A) S1-MME GTP-U tunnel and S5 GTP-U tunnel.
B) S1-U GTP-U tunnel and S5 GTP-U tunnel.
C) S1-U GTP-U tunnel. S5 GTP-U tunnel, and Gx GTP-U tunnel.
D) S1-U GTP-U tunnel and Gx GTP-U tunnel.
E) No GTP-U tunnels are established.

Question 77

During a service request procedure, which message is sent by the MME over the S11 interface to provide the SGW with the eNodeB address and eNodeB S1-U TEID?

A) Downlink Data Notification
B) Downlink Data Notification Ack
C) Modify Bearer Request
D) Modify Bearer Response

Question 78

On Alcatel-Lucent 7750 SGW, which of the following CLI commands can be used to check the number of times a handover procedure has been performed for a particular UE?

A) Show mobile-gateway serving call-flow-stats
B) Show mobile-gateway serving pdn-context imsi detail
C) Show mobile-gateway serving ue-context imsi detail
D) Show mobile-gateway serving bearer-context imsi detail
E) Show mobile-gateway serving ref-point-stats s11

Question 79

A PGW may use various methods to assign an IP address to a UE. Which of the following methods is supported on Alcatel-Lucent 7750 PGW? (Choose the best answer)

A) local-pool
B) hss-static
C) Radius / Diameter server.
D) PCRF server
E) All of the above answers are correct
F) Only answers A, B and C are correct

Question 80

Based on the information shown in the exhibit, what is the TEID value 0xd06015 used for?

A) This TEID value is used by the source eNodeB when sending uplink data traffic to the SGW.
B) This TEID value is used by the target eNodeB when sending uplink data traffic to the SGW.
C) This TEID value is used by the source eNodeB when sending downlink data traffic back to the SGW.
D) This TEID value is used by the SGW when sending downlink data traffic to the source eNodeB.
E) This TEID value is used by the SGW when sending downlink data traffic to the target eNodeB.